@Anjeru: DAAAAMMMMMNNN!!!
@Anansi: A lot of it depends on what one means "a single session". For men, in my mind, a session ends when a man goes flaccid. There can be the equivilent of foreplay between him going flaccid and getting hard again. In my mind, that is a series of sessions. Obviously since a man can do things with other body parts and/or toys, a woman's session does not have this limitation.
Addendum: Some guys don't afterwards. In that case multiple male orgasms in a single session are possible.